In 'bella joins the navy fanfiction', it could be that Bella joins the navy to follow in the footsteps of a family member. Once in the navy, she could be part of a special unit. There, she has to learn to work with her teammates, who may initially be skeptical of her abilities. But as time passes, she proves herself through her skills and determination.
There could be her drill sergeant, a tough but fair person who helps shape Bella into a proper navy personnel.
One possibility is that Bella is forced to join the Volturi for some reason. Perhaps the Cullens are in trouble and the Volturi offer Bella a deal - join them and they'll spare the Cullens. So she enters their world, where she has to deal with the different personalities among the Volturi members, like Aro's calculating nature and Caius' harshness.
Maybe Bella has some personal growth. She could start as a timid person and the army experience makes her brave. For example, she overcomes her fear of heights during a training exercise.
If Bella joins the Avengers in fanfiction, she could form interesting relationships. She might start a friendship with Black Widow, learning combat skills from her. And she could also have some funny interactions with Thor, like being amazed by his strength and his stories from Asgard.
In the fanfic, perhaps Bella joins the army because she wants to protect her family and friends in a more proactive way. Jasper, on the other hand, has his vampire instincts and abilities which make him initially skeptical of Bella's need to join the military. As Bella goes through army training, she discovers new aspects of her own courage and tenacity. Meanwhile, Jasper starts to understand that this is Bella's way of growing and evolving, and he begins to support her by using his own skills to help her train better in secret, which in turn deepens their bond.
Another possible main character could be the base commander. Let's say Commander Smith, who notices Bella's potential and gives her special tasks or opportunities, which then drives the story forward as Bella has to prove herself worthy of these tasks.
Maybe Harry joins the Wizengamot to bring about some long - awaited reforms. He could use his unique experiences to fight against the old - fashioned rules and biases within the magical government.
Well, perhaps Anakin could bring his unique combat skills to the Rebellion. He might use his knowledge of the Sith and the Empire's ways to help the Rebels in strategic planning.
In this fanfiction, perhaps Harry joins the Fellowship and has to adapt to their way of life. He might share his knowledge of the magical world with the members, like teaching them about potions that could heal wounds faster. And his presence could change the group dynamics, adding a new element of magic to their quests.
Well, one possibility could be that Percy uses his skills from his own world to help SHIELD in combat situations. Maybe his ability to control water could be useful in, say, putting out fires caused by super - villains or in creating barriers against enemy attacks. He could also interact with SHIELD agents in a really interesting way, like teaching them some of his own combat techniques.